What games are in it? Is it just those four games in it? Can you change the options for free play/unlimited continues? Do you have to purchase other games with micro transactions?
I haven't played it, but here's the info I've gathered online.
You have 3 options.
1. Buy each pack individually for 400-800MSP on day of release. 3600 MSP for all games.
2. Buy each game individually for 320 MSP a month after each pack release. 4480 MSP for all games, but you can pick & choose.
3. Buy the entire collection (including 2 bonus games) after May 21st for 2400 MSP.
You can see the release schedule
here.
Personally, I'll wait for the 2400 MSP pack on May 21st. Also, there is the possibility of a retail disc down the line, but that's not confirmed.