hank pym vs tony stark (prep war)
no PIS/CIS, just which guy would win if allowed to use whatever resources are available to them in a week.
after a week the two teams clash on the battlefield with whatever they cooked up and/or brought to fight with.
anything is in play, even an extra two members (just as long as it's plausible that they would and can fight for them and they must be within 1 degree of separation (pym's ants are unlimited however))
no reality gem