I've read in some posts by devs that the plan is to have characters go up to level 30 at roll out and then later extend it to 50 level max. I hope the plan is not to make 50 the hard cap for all time. I mean, I personally would leave open the possibility of going above that if you want to, some time in the future.
CoX had a hard cap of 50 and it was something of problem. They invented the Incarnate System to sort of work around that problem, and arguably that system was levels 51-55 at the time of the shutdown.
Another question this raises is this: Will there be a level cap difference between subscribers and non-sub players?
R.S.O. of Phoenix Rising