For the better future of this game they need to work on franchise because now it's future but need some good system and rules which never hurt others with this they can go ahead like UEFA is going, and they are currently one of the best system with good fan base and too much money around them.
ICC is authority which can bring them on table for fair rules and better management because these things are very important even Indians are going to control few leagues around the world but still few countries are going to have things which will be not under their control and this can create conflict which could be never been healthy.
Right now BBL, Vitality Blast, BPL and PSL are having not Indian connections which mean they also need some better treatment from ICC for good future just IPL is having special treatment is never been fair.
If I am not wrong, some of the BBL franchises are partly owned by Indians (but not by the IPL franchise owners). I agree that they don't have any involvement yet in BPL and PSL. But this can change. We have seen how fierce was the competition to get ownership to the two new franchises when the auction was announced. In the end Goenka and Citicorp won the bids, while Adani and Glazer failed in their attempt. Those who failed to win the franchises have two options - either they can invest in leagues outside India, or they can invest in state-level leagues such as the TNPL.
IPL owners do wanted to invest heavily in BBL but i guess CA didn't gave any permission, situation might change in near future if they head towards privatization. Atm BBL's teams are owned by CA and state bodies.
They also need to think about their own national players participation. Also the way IPL owners are investing everywhere i think some Indian players might start playing in other leagues too, may be not national contracted players but it's possible for un-capped talent.