didn´t they say that they did consider bringing the warden back instead of having the choice be between Hawke and Stroud/Alistair/Loghain, what if (and I am not expecting this to happen but still) they brought them back for a dlc that deals with whatever happened at Weisshaupt?
They didn't really say that, it's just a popular theory/truthism among people who want to see the Warden back.
As for a DLC that focuses on the Warden... the Warden is dead on many people's universes. Even more so now that the default world state that new players are using has the sacrifice too, instead of the ritual. So, not even couting the fact that BioWare has declared the Warden's story over, there are practical limitations to how much they can be involved if they were to be brought back.
(There's always the "but the Orlesian Warden" counter-argument, but... as someone who actually loves her Orlesian Warden and was disappointed they'd didn't even bother using the OW for an equivalent war table mission to the one the Warden gets, I'm not counting on BW bothering with everything that would be involved in this replacement. They still haven't even given the OW a decent character tile at the Keep to signal their existence.)