League of Legends champion roadmap was announced before it was posted on 16 October 2019 and it has delivered on the promises. The blog post offered more insight into three brand new champions and two upcoming reworks.
Senna is the first of the three upcoming champions described in the champion roadmap since she is the closest to release. Considering the lore described her as a marksman, this is what Riot's champion designed team aimed for. However, they wanted to make her able to lane with Lucian, given that they are husband and wife, so she eventually became a marksman/support hybrid.
Lucian will get a few voice lines to reflect the return of Senna and his own story progression. Those looking forward to the relic cannon wielder can first encounter her on 29 October 2019 on PBE or on 10 November 2019 on live servers.
The second champion on the roadmap is described as a religious fanatic that was groomed to "protect the faith from those who stand in the sun" which obviously hints at an ally of Diana and enemy of Leona. Furthermore, this new marksman will apparently have diverse "weapons of faith" that they will cycle through "like cycles of the moon" which leaves no doubt to their origins. The teaser image contains prayer beads and a reference to "zen-like" focus which may or may not be a reference to Overwatch's Zenyatta.
Zaun is the home of the third upcoming champion. This one will be a juggernaut as Riot felt like they didn't release a new champion in this archetype since Darius' rework. This one will apparently feature a mechanic that will let them absorb enemy attacks and possibly abilities in order to amplify the damage of their own, a proper champion for those who like being in the thick of it.
Fiddlesticks' rework seems to be coming along well as the team agreed to focus around inciting fear in Fiddle's enemies. The scarecrow will now look much more terrifying, keep the long fear ability and possibly have a new illusion mechanic where enemies will have to guess which one is real.
Volibear's rework is in earlier stages of development though, but the vision for him is taking shape. Riot previously experimented with giving him permanently immune to crowd control mechanics and grotesque art style but these have since been ditched.
More information on the reworks will come through 2020 along with new info on two additional champions that are in early stages of development. One will be an edgy solo laner and the other is a whimsical jungler.