to TtSCC-verse based story, well you could have some trouble show themself in the Alliance main computer, have something that looks like accidents like i do not know, let a nuclear bomb go off in a couple millitary camps in the core and what not.

the allan verse, well, you could have set up an epilog, where showing after after some years where they might all be dead, but how a new golden age of relative peace and prosperity has arisen. where the old homesystem of and the Verse/system/systems has united in friendship.

the Max verse well that´s is interesting what can happen there that is big question, perhaps it could be time to introduce a new enemy, that either scare even the reavers, or make them work with them(some kind of startraveling Barbarian horde, or Religious fanatics semilar to the Ori of Stargate(that are not entirely as strong as the Ori is shown to be:-)

could be why the Reavers attacked Mir(the Reavers has become even more active do to the arrival of the new (said in a dramatic thundering voice)and coming DARKNESS!! LOL just and idea

I'm afraid I've never really seen TSCC, so I can't give much advice, but I do like what you're doing with your cross-over and I'd just like to give you a little encouragement.

Like i keep saying, Bring in John Connor, and C.Weaver. That should really shake things up, having three teens aboard, although technically Cameron is hundereds of years old, emotionally she hasen't really evolved from the machine she was with John, even with spending time with River, Cameron is still very much machine minded, now with John Connor and her in a relationship, i.e. boyfriend girlfriend, husband wife, she could really expand as John's hard life made him secretly admire everything that much mre than anyone can, and that spreads to feelings.