I think they can pull off something like Destroyer, but it just wouldn't have as many characters running around. You can still have League members doing jobs, while Superman fights Darkseid. I would love for Cavill's Superman to give the "I've been holding back" speech to Darkseid.
Saw Thor. I enjoyed it. The cast was really good (good to finally see Hemsworth get a chance to loosen up as Thor). The comedy was fine, but not every joke landed for me. However, I think the humor worked better here than in Guardians 2. Definitely the best Thor movie by a mile.