Round 1: Majestros takes it, Thanos probably edges out on Supes
Round 2: Stalemate. Their abilities would overlap and make up for each others shortcomings on both sides.
Round 3: The Kheran/Kryptonian team takes it. You gave Majestic a week of prep. That's like giving Thanos 20 years of prep-time.
Mr Majestic can pwn if he has creation blades. He can also travel the Universe in 4 months and can move planets with his hands. His eye lasers was able to make Jupiter solid. He can build machines within nanoseconds.
He changed it to a solid? I thought he just changed the chemical composition ie changed the type of gas.