Sell Pombo and Martel NOW! If you sell them at the start of next season, they'll be costing an extra 100-300k because you're paying for their player salaries. If you sell them now, the prices won't drop that drastically so in a way you'll be saving money. Then wait till you get your draftees (who knows you might get a steal ;)).
With the money you have left over expand your arena OR just raise your ticket prices
If no good draftees come through - just buy a fresh 19 or 20 year old to train alongside your other bigs. Should be fine for you :)
GOODLUCK!