Ooooo... well now I'm curious for an answer to this as well. I'm in the EXACT same possition as the OP. I have 3 trade tokens and I got Wixwell from a shard about 3 weeks ago. So I was going to use the new fusion to summon Titus as well. Kinda $@^#*(&@ if they nerf Titus now. The Titus/Wixwell combo has been #1 team for Chimera/Hydra/Clan Boss for almost 6+ months now. I literally don't understand that if this has going on for so long, why nerf it now? It's like you're punishing everyone that has been working on trying to get the both of them since Titus came out. I know Wixwell was even a target, progressive summon a month or 2 ago. If someone blew a ton of shards to get him, I'm be mad as hell about it.

For some reason, I'm not surprised by Plarium's policy. Nerfing a viable character who is constantly used in some content, after which they just lie in the storage or wait for some rare content

I haven't heard anything about hydra.

Supposedly there will be a change to CHIMERA clash scoring to focus more on trials than to overall damage, which will make Titus teams far less competitve even though they still do just as much damage.

Now THIS I support. My Nightmare Chimera team scores roughly 100-120mil damage with 11-13 trials completed vs a clan mate that only completes 4-5 trials and yet with our Chimera score he does better. I always found that odd. But I'm also a resource hungry person and complete the trials just for the relic parts.

Nothing officially announced for Hydra.  Be surprised honestly if there was. 

Kinda funny though cuz anyone capable of it end game chases mats anyway.  Chimera clash rewards are an absolute joke.