This is the question that always comes up when Vs. System games show up, huh~ I won't claim to know the ins and outs of Hamster's process, but I do know that they use real boards in their development- Ninja Emaki launched without the international version because they didn't have access to a board, but it was patched in after a board was leant to them.

As a result, for those Sunsoft Vs. System games to show up, Hamster's gonna need those boards, so they'd either have to make a deal of some kind with the owner of them (I believe it's the same person who owns those three Sunsoft games) or find other boards. So, probably not, much as I'd like it to be so!