The Agency's name is Tricell. It is unknown, but highly likely that they will. Umbrella is completely gone and no other company has been introduced.
Well, actually, Tricell can't be the Agency, Wesker betrayed them and went to Tricell afterward, so why would they accept him again? They are most likely a different organization, but who knows? I could be wrong. Also, another company is Seashell, so there is them to bring into it.