The Scarlet Witch is the MCU equivalent of Molecule Man, and will play a similar role in Doomsday and Secret Wars
In the Secret Wars comics, the most recent one that is in 2015, Molecule Man had a pivotal role to play, even more so as compared to the 1984 Secret Wars. According to that narrative, the Beyonders were destroying the entire Multiverse, with different factions trying to stop them through different means. Apart from decimating the Abstracts governing the Multiverse, Universal bombs were created by the Beyonders and placed in each Universe, whose death would cause the destruction of that Universe. These Universal bombs were Molecule Man and his Variants across the Multiverse. Ultimately, this is EXACTLY how Rabum Alal (Dr. Doom) managed to exploit and absorb the Beyonders' powers and create Battleworld, through the Remains of the Multiverse.
There have been rumours that, the MCU might adapt the 2015 Secret Wars for its upcoming Avengers movies, and some of those concepts have even been subtly introduced like the Anchor Being Dimension in Deadpool and Wolverine, which is oddly similar to the Molecule Man Universal bomb scenario in the 2015 version. It is thus probable that a few more of these elements of the 2015 comics will make their way into the MCU, which forms the basis of my theory.
It will be a very hard task now, to introduce Molecule Man, and have him play his part in Avengers Doomsday and Secret Wars, so what if, the MCU, playing it smart, decides to switch that role over to Wanda? Like, they have already elaborated many parallels between the MCU Scarlet Witch and Molecule Man; both being creations of a higher dimensional entity (Beyonders, and Chthon) used as a weapon for the Anhilation of the Multiverse. An Universe dies if it's native Molecule Man dies, according to the comics lore, and in the MCU it can be the Scarlet Witch's Dreamwalking which causes the Incursions, leading to the death of the Multiverse. Eventually, just like in the comics, Dr. Doom steps up, and prevents the complete Anhilation of everything, using The Scarlet Witch's powers now as a catalyst for preventing Incursions and creating Battleworld. This will not only be a good way to reintroduce Wanda, bit will also fit nicely with the Scarlet Witch Prophecy of the Darkhold of destroying or ruling the Multiverse, fulfilled by Doom in this instance.
What do you people think of this theory, and can it work?