That looks good!
I've put together different versions of similar chicken casseroles based on bite-sized chunks of pre-cooked white meat.
The mix might include a can of cream of chicken or mushroom or celery soup, chopped celery and onion, chopped red/green peppers, frozen peas, mushrooms (I use a small can of mushroom stems and pieces), a little Worcestershire sauce or soy sauce, water chestnuts and/or slivered almonds.
Topping might be crushed buttered herb dressing mix, crushed potato chips or french-fried onions.
If the mix needs to be more creamy, a little bit of sour cream or milk is added.
I just mix it all together and bake in a casserole dish for about a hour. It's one of those never-fail dishes for me and it seems to go over pretty well with others.