Personally, I think the series doesn't need to be rebooted per se. They could release an enhanced edition that cleans up timelines and plotholes and includes deleted scenes, but that's as far as I would go with it.
Instead I would like
1) a prequel with young Oenomaus, Titus, young Quintus, young Lucretia trying to maneuver her way into the upper classes, Titus's wife, Ulpius as champion, and a newly-arrived Gannicus
2) a GoTA-style season between Vengeance and WoTD that's just about preparing for and then seizing the mines
3) post-WoTD Triumvirate shenanigans
4) Gannicus's travels between GoTA and Vengeance
5) prequel with young Glaber, Ilithyia, and Albinius
5) live-action versions of the comics
6) story about survivors of the final battle (but not about Nasir and Agron, their story ended in a good place and I think adding to it would kind of betray the ending of WoTD)
7) a story about Nasir's dominus and that household, and maybe he has dealings with Crassus, Solonius, Batiatus, etc
8) the same show format but about Mithradates and the Mithradatic Wars
9) pre-WoTD story set in Sinuessa that includes Laeta and her husband, the Cilician pirates, Sibyl, etc, and leads up to WoTD ep. 2