We are working on a consensus to halve the current block reward from 12500 to 6250. We will add a developers fee of 250 coins. This will make a block reward of 6000 coins and 250 coins for the developers.
We need a developers fund to be used to pay for infrastructure costs, web design, graphic design, marketing, exchanges and more. The developers fund is a very small amount but gives a very large incentive to expand BitcoinZ.