Re: When Worlds Collide: ideas for universe crossovers
I'll try to explain this as briefly as possible as it was a little complicated, but... bottom line was... I had an extra-dimensional version of my PC's team suck them into their dimension to help them battle a "Old God" that basically ate dimensions. Since the other dimension's timeline was slightly accelerated, the other team of heroes was about eight to ten years older, so the other team had one of the hero's children on the team and acting a hero, possible glimpses into the futures of some of the other heroes, etc. It was pretty cool and worked out really well. Of course, the main team's dimension was next on the Old God's list of realities to destroy... so that gave the PCs a little initiative in dealing with the disaster.
Robb