What to do with unclaimed coins has not yet been decided. One proposal from a few weeks ago that UP made internally was that we use it for trying to get some full-time devs, but nothing is decided completely.
Why not just distribute the coins to all stakeholders equally?
There is plenty of coins left for development -- 10% is 400 million Nem plus all the BTC you will have with the auction and first IPO?
It sounds like you really just want more coins. Don't beat around the bush.