^That's probably true(but Gogeta could still fulfill the fanservice bit!), and the bit about the dragon balls being used to defuse is probably true too.
Meh, I just hope that we get a canonical Gogeta at some point, it's kind of lame that the fusion dance is exclusive to trunks and goten and it's even useless on them now.
Speaking of, how exactly was potara fusion stronger than the fusion dance? I know it last longer, but did it provide any extra power boosts?