Hi! While nothing has happened with this yet, it's still a project I would like to make. I have a lot of stuff to eventually get back to, as I've been working on other projects such as Super Gear Quest (which was released on Steam a while ago, here: https://store.steampowered.com/app/545880/Super_Gear_Quest/).
If you're interested in what's specifically going on with Solarblade though, it's hard to explain, lol. Sol is very important to me, so games about him will happen, but its complicated. There was a lot I feel could be far better about Solarblade 3D, but you're right it was a cool demo and a decent start to something bigger. In a way it has been though, as it has lead me to other projects and more experience with 3D, and Solarblade 3D was a step towards some of that, since making games is a learning process.
But yeah, Solarblade in itself is more likely to be a 2D game with 3D elements, which you can see some of here: https://felixblobdev.itch.io/solarblade
Or alternatively, here as well: https://www.indiedb.com/games/solarblade
So I'd say the project is alive, but progress is slow. Solarblade 3D is also a project I would love to make still (as in, a fully 3D Solarblade), but I realized the scope was a bit too large for me at the time, so I'm starting with something simpler and trying to keep it small enough to be manageable. The current idea is that a fully 3D one could possibly be a sequel to the newer one I showed you, but that could obviously change.
Either way, I would still consider both versions of Solarblade to be legit projects I wish to get back to, but things take time. I'm still trying to release more games in general. If you wanna keep up with that, the Discord is always a possible place you can go as well (updates are slow but I try to keep it alive): https://discordapp.com/invite/blobgames
Anyways, with all that said, if you have any questions or anything, don't hesitate to ask. I'll be happy to answer if there's anything else you'd like to know!