It is certainly no harm speculating on the composition of 2 teams. However, even with this set up there are many players who will view ODI as a relegation. Just read Vikram Solanki's Q&A article where he clearly feel that his ODI slot is a stepping stone for a test place.
If this is one way to keep BD players from losing touch with internatiional match practice, why not.
The problem with the team i chalked up earlier is that:
a) The captain issue is,nt settled as you pointed out.
b) The unease and uncertainity remains of how the rookies are going to perform at int. level, i.e Nafees, Miniruzaman etc
Lastly, just as a thought is'nt it more expensive to have 2 teams. Is it affordable?