An all-stars team presents relevant challenges related to egos from many perspectives. Yet this can be turned into a boost in productivity and effectiveness through making sure that the focus becomes on: a common project which results present benefits for all; the practical and pragmatic value of diversity is understood as a key leverage towards that target; and, essential factor, roles are well to make sure that any single star is going to shine from a clearly identifiable unique spotlight. For all of this a marked authoritative, assertive and overall positively charismatic leadership is essential.
Interesting Harvard Business Review Blog read:
How to manage a team of all stars