Another rabbit? Hmm.....going to make life interesting I guess.
You say he's "big"....but how big is he? Can you give us a weight?
Trim his fur Rosie? ha! Who wants to trim that fur.....?
Ok - I do have some that I have to trim because it gets in their eyes...
Lionheads are frequently more tame than other breeds (depending upon their bloodlines and the breeding environment). ...so two neutered bucks *might* get along.....they might not.
Since you now have two males and two females, I'd create two bonded m/f pairs. Many of my does will try to get out of the rabbitry during playtime to go live with Tiny....and its hard 'cause I go to get them and he will get between me and them and nip at me if I try to take away his latest "cute thing". I say that to say - they can be bonded to other breeds and not just lionheads.
Just as a word of caution...from my own experience and being said from a heart full of love and not criticism - ok?
Please be careful about adding any more until your babies are born and have left home....
I think it is wonderful that you adopted a "special needs" rabbit and I'm sure you'll give him a good home.
But babies can be overwhelming and having four rabbits can be overwhelming - particularly when you have the babies too. There can be times of stress where you may be like, 'Oh...if I'd only waited" or "Oh...I wish I could keep a baby but I just can't keep another one" and it will be tempting to take one of the oldfer rabbits to a shelter or adopt it out.
So maybe just don't add anymore for a while - till you've seen how much stress having additional rabbits can cause on both you - and each other.
Also - as cute as he is - don't forget to quarantine him for a minimum of 2 weeks away from other rabbits just in case he's ill. You don't want to pass anything on to your other rabbits - especially the pregnant one!
Peg