Azrael the Cat said:
I'd love to see an Eccleston/Tenant/Smith cross-over - though they haven't really introduced any recurring enemy in the 'deserves a cross-over serial' league, except maybe Rasillon in The End of Time.
As much as I would love this to happen as well there was a Director change when Matt Smith took over as the Doctor and the old and new Directors really don't like each other.
This may not come into it could just be a one off three parter special.
Also another problem with this is that Eccleston was only in it to get it off the ground.
Alas, I would LOVE to see these three working together. I really.. REALLY would...
But then, if Tenant meets Smith then the end of Tenant series when he thought he was going to die wouldn't have happened.
OT:
Gorden Freeman (Previous Experience and has been to an Alien World)
Older Simon (Gurren Laggen, would provide space travel and take the fight to the Aliens once earth was safe. Would also Lead the team)
Older Nia (Also from Gurren Laggen, Useless in combat, but the Aliens would kidnap before they fully attack earth giving Simon more reason to fight them.)
Master Chief (Previous Experience)
The Engineer (TF2, Give him a bar of Australium(You'll only understand that if you read the TF2 comics) and let him work on Simons Mech)
Samus (Need I say more? Comes with her own Space ship)
The Doctor (Matt Smith to be exact, favourite Doctor after all.)