Goten : no way of making that, will need to use fusion that won't be inserted or he'll have to be over powered, because it's a fused goten and trunks for pete's sake.
Trunks: Already in. o.o
Videl: I find no reason to add her, she's weak and she doesn't have any attacks that I know of exce[t for melee and flying.
Pan: GT content, won't be added.
Maybe if you want them in, give a more detailed post, give information and WHY you want them in. But I also don't think the team would want to make all these models and animations again in anyways.