Some things I'd advise strongly against:
1) Throwing everything into the mix. Just because the universes have lots of interesting races and factions there is no need to use them all. I'd especially advise against changing enemies in mid fic.
2) Showing favouritism to one universe. Don't have a single StarTrek ship slaughtering hordes of B5 ships or visa-versa.
1) Throwing everything into the mix. Just because the universes have lots of interesting races and factions there is no need to use them all. I'd especially advise against changing enemies in mid fic.
2) Showing favouritism to one universe. Don't have a single StarTrek ship slaughtering hordes of B5 ships or visa-versa.