We don't know the state of his injury. Do you? It is expected that he would be fine by June. I don't think his injury would deter potential suitors from showing concrete interest in him this summer. Besides, one assumes that any transfer talks with potential suitors would have commenced well before the injury.
Naylor reported this week that the potential Summer tour to Japan is somewhat on hold because it's not yet known if Mitoma could play a part in it due to his injury.