A few days ago, we reported the release of DragonFly's arcade-style mod SkullDash. The new approach was well-received by the community and therefore an expansion pack was inevitable, not only in my and many other Doomer's eyes but also for the author himself. And well, development already started and if you are interested, you can even be an active part of it as the expansion tier is meant to be a community tier after all.
For myself, I already finished my contribution and send it to DragonFly and I really suggest you take a closer look at the project and join us. In my eyes, the gamemode brings a whole new component to Doom's gameplay and this is what makes SkullDash so damn interesting and varied. Be part of it - either by trying it out or contributing your own map.