Yes, but my question was where did you hear the rumors that GM200 was coming soon? It seems unlikely to come out so soon after the 980. I'm asking because if soon means...before November 18th, then I'll hold off on my 980 purchase.
It's likely a useless upgrade but I'm eager to see Maxwell for myself(Have a GTX 780ti), and the extra 1GB of VRAM should come in handy in DA:I, ArmA 3, Modded Skyrim and a few other games with high VRAM usage.
From the circles I travel in, the speculation is that the "Big Maxwell" will be held off until AMD makes their move with their new line and then used to counter. Supposedly AMD will release the R9 300something in the spring of 2015.
Or if you go by the release pattern from the NVIDIA's 700 series - specifically the 780ti, then one could expect a fall release.
Basically, it seems unlikely that NVIDIA will release something else from Maxwell to consumers before or around DAI is shipped.
Personally, I would hold off from going to the 980 from a 780ti. Currently clock for clock, the 780ti is nearly on par and the 980 does need those substantial 1400-1500MHz+ overclocks in order to gain its performance edge on an aggressively overclocked 780ti.
I actually had a 780ti as well and the only reason I have switched was because I was able to utilize EVGA's Step Up program. Had Step Up not been available, then the associated purchase cost versus performance increase would not have been in my favor (even factoring in selling the 780ti).
Unless there are specific features you really want to utilize, if you are in a situation where you would have to purchase the 980 outright, then it is probably best to wait for the next release from NVIDIA or AMD.