Champion! I usually end the season in Champ 2 and spend the first 3-5 days in diamond.
I'll keep an eye in the soulbound cards, although I'm less interested there as the cards I have are RNG instead of hand-picked by me (e.g., I only have level 1 Iziar still).
Gladius cards I'm also not too interested in - I think the 6 mana summoners are overcosted, and the gladius ruleset means the opponent can use it too.
A big part of why I want to follow Rebellion is that part of what I'm interested in seeing is how quickly the bots adapt. The set has been out for 3 or 4 weeks now, plenty of time for the bots to get a handle. So I want to see how good they are at using Rebellion, as a proxy for how good/fast they are at evolving and learning the new meta.