Possibility #1
Somewhere, somehow, a black hole is created at the location where the Reapers fleet is supposed to arrive (probably anywhere on any of the Milky Way's spiral arms' end, or the "borders" of the known galaxy's farther systems). The black hole should theorically suck in all the Reapers.
Possibility #2
Dark energy is used on one or multiple star(s) to create timed-bombs (of sorts) for when the Reapers arrive in specific star systems. Upon arrival the star should explode and enter the stage of Supernova, killing some or multiple Reapers in the process. The method is repeated until all the Reapers are gone (although quite unlikely to happen, still, I consider it... it's science-fiction after all).
Possibility #3
Shepard (perhaps with the help of representatives and/or his teammates) assembles a never-before-seen "army of the galaxy" à-la Dragon Age: Origins, gathering all known species' military resources (also including all or a part of the Geth and Rachni) under all branches to confront the Reapers fleet in one single mega-scale space/planetary-Citadel surface-orbital battle that would end the Reapers threat once and for all (lots of people seem to think that this will happen, but I don't think it will).
Possibility #4
Somehow, Shepard and company (probably with the "help" of Cerberus, either directly or indirectly, or even the Shadow Broker, indirectly or not as well) manage to find a way to deactivate/stop/block/trap the Reapers fleet before they manage to reach the galaxy, or just in time doing so as the fleet arrives at the borders of the galaxy, thus avoiding a possibly doomed epic space battle (such as the one in the scenario above) in the process and ensuring that most (if not all) species' military (and other) resources are barely scratched at that point (in my book, it's possible, although it wouldn't generate any epic space battle of any type, perhaps lacking action overall, making the "final battle" boring overall and making the mass ME2 fans deeply disappointed, not likely to happen for this reason, and I believe that many good scenarios will be scrapped in favor of a more action-oriented one).
Possibility #5
We learn that somehow until that point (the point at which we learn it) that Shepard had hidden Reaper-based technology augmentations inside him/her via one single or a multitude of "experimental" implents (which was probably hidden to Miranda as well during the Lazarus Project), probably based on, or taken from the remains of Sovereign at the battle of the Citadel two years earlier. Somehow, and sometime at one point (at least) during the game Shepard finds himself/herself in a situation which requires (or forces) the use of the capabilities that those implents allow, and of course somehow it plays a major role in "stopping" the Reapers (or turning them against each others for some reason or another), buying the allied species some time to finish them off in mass or (at worst) one-by-one.
Possibility #6
The Reapers come, they systematically wipe out star systems after star systems, relentlessly, most races capable of waging war in space try their best at it and at times do manage to slow down individual Reapers, or small groups of them, but ultimately the gains and victories are only negligable. Eventually, the Reapers take out the major planets including the home world of each "main" races including Earth. The species and their last resources retreat and gather for a final defense at the Citadel, the battle starts (at that point many months or most likely many years have passed since the very first star system fell), the allied organics' forces fall like flies, Shepard and company find themselves on the Citadel or in one of the remaining battle ships and they finally have hope when they see the most unexpected of all events when the Leviathan of Dis arrive and wipe out the Reapers with the help of the allied races. After the battle Shepard communicates with Dis and the later explains what it is, where it was, why it came, why and how it destroyed the Reapers, and so on, and so forth. The galaxy is saved, Dis disppears without leaving a trace, all races mourn the lost ones, slowly but surely things go back on track (call me crazy but somehow I think that the Leviathan of Dis will appear at one point or another in ME3).
Possibility #7
David Levinson and Captain Steven Hiller take a shuttle disguised as a Reaper (physically and/or by identification signal) to the Reapers fleet as they arrive at the galaxy's border and upload a deadly virus to Harbinger who foolishly mistakens the virus for vital information concerning the potential enemies to fight against and himself/itself uploads the same "vital information" to the rest of the entire Reapers fleet, disabling them all almost at the same time, which in turn buys some time for Shepard and company to destroy the Reapers while their external shields are off-line (well, I already said in another post that my sense of humor is lacking, but I know some people will know what I'm referring to here, still, rather interesting possibility, just déjà-vue... on second thought, no, not interesting, still... it's a possibility).
Well, take any of these with a grain of salt, they're just my opinions, frankly I think that BioWare has a very demanding task in finding a way (or multiple ways, for multiple endings perhaps) to deal with those Reapers if they do manage to physically reach and threaten the galaxy.
Modifié par Lyrandori, 19 juillet 2010 - 11:21 .
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