Very excited about a new Egypt leader. I still have a soft spot for Egypt even if I don't think they are all that powerful. I play them fairly often compared to many civs.
I would love another German leader, but that's the dreamer in me.
Not sure we need another England leader as we have 2 already, but I know she's popular.
Someone mentioned Lincoln having some diplomatic features, but one of the Teddy's already has a diplomatic focus, so that seems unlikely. And I feel like Teddy should be the diplo leader regardless. And the other Teddy gets combat bonuses, so I'm not sure what Lincoln would do.