Are there a limit to figs u can have on the sideline, ae, morph, promotion, zuvembies, Maddox. I was told 3 per 100 max of 15 with all the Spiderman in this last set that could leave little room for zuvembies

It should be set as part of the event format. They removed the WizKids standard from the tournament rules.

Zuvembies, Madroxes, and any other characters that are added to a force, as opposed to replacing a character already on the force, aren't part of the sideline and can come from anywhere outside the game. You could have a box full of those, if you want.

This line:
Was in the July, 2012 Comprehensive Tournament Rules document, but is not in the most recent one, from 1/2013. I'm not sure if that was a mistake, or if it means that the restriction should be left up to individual judges.

That said, Zuvembies and Madrox figures (Madri?) are not considered replacement figures and would not have a limit to how many are on your side line.