Oops! Sorry about that. I guess you had mentioned the Gondor-alliance first; I must have forgotten. In that case, then, I agree with you.
I did add a couple thoughts to the basic idea, so at least my post wasn't a complete waste.
And yes, I saw what Dalf32 said. I was thinking more along the lines of an inn-faction, anyway, since Arnor needs something of the sort.
However, I seem to be missing your reference to Halbarad. I looked, but I'm just not seeing it. Maybe it's just me; wouldn't be the first thing I've missed today! This may be a little strange, but I was wondering, if the Dunedain inn-faction does become a reality (for the WotR era factions, I should add!
) that maybe Elladan and Elrohir could be two of their heroes, alongside Halbarad? Maybe the two of them could be both for the elf and dunedain factions, considering that they helped both.