Seems like all the villains want to jack Wesker’s vial. T-Virus perhaps? Looks like they are going for a more laid out story which adds a bit more depth to the series. I still don’t know what the plot for Marvel vs Capcom 2 was exactly.
Of course new characters have been unveiled and I have been slacking a bit in providing footage. Here is gameplay footage for C.Viper and also for Storm.