It's an understatement to say that there'll be plenty of games at E3, both previously announced and unannounced, and one of the companies that will be there with new stuff is Capcom, as they have now posted a list on what they'll show.
One of the things we can expect to see is a game listed as fighting / wrestling for PC and PlayStation 4, which is most likely connected to Street Fighter V, but then there's another game that has garnered some attention over on ResetEra, which is a title listed as action / adventure for PC, Switch, and Xbox One. We assume the PC and Xbox One game is the same one, but the Switch title could be something different.
A reasonable guess is that it's related to the Dead Rising series, which has traditionally been aimed at PC and Xbox One, but there's also speculation that it might be connected to the Devil May Cry or Onimusha series. Why PlayStation 4 isn't included is also unknown, but as E3 is only little more than a month away, we won't have to wait much longer for the answer.
What do you want this game to be?