I don't think it would be necessary to merge them. They are technically seperate, with the Futures team now being a 'past article' in that the SFA have abandoned the idea of a 'Futures Team' in order to concentrate on the national under-19 and under-21 teams.
So if someone would care to add more info to the Futures team page, it would be recognised as it should be - seperate from the national team.