I've been playing on my DC and trying to get a handle on the combo system. It's been interesting, as I really didn't play much of the vs. games back in the day. Anyone have any tips?
What you want to aim for is a ground combo, usually initiated by a jump-in attack, that ends in a launcher. Each character has a launcher or two, I think. For instance, crouching heavy punch with Strider will have him execute a vertical sword slash. If I remember right, MvC2 makes you hold up immediately after the launcher so you follow them up into the air, where you can complete another combo. You want to finish that combo with a super move.
So the typical breakdown of a combo is initial hit->ground combo->air combo->super move.
The VS games usually use a combo linking system that's referred to as the "magic series."
The Magic Series
The VS games usually use a combo linking system that's referred to as the "magic series."
To make the Versus series more fast paced and combo dependent, they added a feature that is known as the magic series. The magic series is a rule that allows you to cancel between normal moves to create large, multiple hit combos. It has been in every Marvel/Versus game to date and has even been used in other Capcom titles. The magic series rule is as follows:
LP > LK > MP > MK > HP > HK
http://wiki.shoryuken.com/Marvel_vs_Capcom_2/Game_Mechanics
It's fairly simple to figure out a few combos from just messing around with a character and following the magic series rule.
It's also mandatory to have Servbot on every team you pick.