They have not mentioned d20 or Marvel. IIRC they also said in a press release about a future science-fiction video game, that any new RPG would not be with old IPs. We may dream of Gamma World, Alternity and Star Frontiers but we won't get them. I think that instead we will get a brand new and contemporary science-fiction game. I'm thinking Transhuman sci-fi mixed with Firefly.Since 5E has come out, and correct me if Im wrong, on the TTRPG side WotC hasnt released or shown any interest in anything other than D&D and its spinoffs like MtG, Critical Roll and Aquisitions Inc. All of which runs on the 5E rules so Id be surprised if we see anything other than D&D for awhile. Have they made any mention of old properties like d20 Modern, or Marvel Superheroes?
Whether it will be based on the D&D5e engine remains to be seen. I'm of two minds on this. I would really like a system created specifically for sci-fi. I would also like a unique setting and not just a generic all you can eat pizza of options.