Oh Luke was definitely asking her about their birth mother, knowing that it was the same woman. The question here is that Leia didn’t know what he was talking about. Since she gives him an answer about someone who died when Leia was young, maybe she’s just thinking that Bail remarried later.
Before the prequel trilogy came out, it could have been their birth mother she was talking about, and she just didn’t know that Luke was her brother; but after ep 3 came out, and we see Padme die, we have to assume Leia was adopted by the Organas, but Bail’s wife died when Leia was young and he later remarried, and Leia is thinking about that woman after Padme and before Bail’s new wife, thinking that she is her real mom.
And yeah, it’s completely possible that Lucas originally intended for Padme to be the one Leia was talking about, but the point is, the movies don’t actually specify if she meant Padme or the middle wife, so it can still be explained.
No one has MvC2 on any playable system today, because it was removed at some point from all digital stores. Not counting the obvious piracy choice, the MvC2 community that’s still going strong has been crying for a rerelease for literally two decades. So that collection has a decent chance of doing notable numbers.
But yes, they pulled that bait test a couple times before and never went anywhere with it and that was super shitty. I don’t have any hope that this will revive MvC because it’s not up to the players, it’s up to Marvel to let Capcom make a good game. This collection is still very much appreciated either way.