In my dream scenario the next round of movies to be anounced will be this:
Solo Batflek movie(hints of potential trilogy)- base movie off older, veteran Batman stories. Perhaps introduce Huntress (it'd be interesting to see Batman discovering he has a daughter and exploring that relationship), Nightwing, Oracle, Red Hood, etc. I imagine while Red Hood will be the main adversary for Batman in the movie, the Joker and Harley Quinn will likely play a role. Given hints of her portrayal in SS, I could see them give her a slight redemption arc and obtain anti-hero/tragic villian status. In the new 52 comics she also has a relationship with Poison Ivy.
MoS 2- more focused on Clark Kent's life as well as his relationship with Lois. Have their be a lot of banter and fun moments between Lois and Clark. The plot is that Lex Luthor is running for presidency. His campaign runs on a fear of Superheroes/vigilantes. His campaign is reminiscent of Trump's. Perry assigns Lois and Clark to covering the campaign. In their investigations they discover that he is working with Milton Fine on a top secret project and is harvesting kryptonite. Milton Fine is working on creating Bizarro funded by LexCorp. Milton Fine is actually Brainiac but is using Milton Fine as a cover. Brainiac sets a trap at the FoS sending Clark to the Phantom Zone. Martian Manhunter reveals himself to Lois telling her who he is, mentions he used to apart of the Justice Society of America and informs her of Clark's danger. He teams up with Batman and WW to enter the PZ and get Clark out of there. Lois stays behind and continues her work and covering for Clark's absence. Cat Grant is partnered with Lois, due to Clark's absence, who is a pro-Lex supporter at the DP to offer a contrasting opinion to Lois. Bizarro is complete and quickly acts as an imposter Superman. Bizarro also has a particular interest in Lois as well. Movie covers how Lois deals with developments in the real world and the other team in the PZ working on saving Clark. They eventually all make it out of the PZ. Superman vs. Bizarro, Superman wins. Superman vs. Brainiac, Superman destroys Brainiac except Brainiac infected Lex Luthor. So a tiny part of Brainiac lives in Lex Luthor that will eventually gain full control. Lex Luthor wins presidency of the US.
Suicide Squad V. Justice League: Checkmate- The goverment organization, Checkmate, under authorization of President Luthor has taken a strict view against superheroes/vigilantes/Supervillians. They have decided to utilize the Suicide Squad to capture all known individuals who fit that description and force them to work for the goverment on special task missions. The first ones targeted are an older underground superhero group that existed decades ago known as the Justice Society of America having superheroes such as Doctor Fate, Hawkman, Hourman, Atom, Martian Manhunter, Wild Cat, etc. as well as a few younger apprentices such as Stargirl, Cyclone, etc. As SS begins to carry out the mission, locating the members of the JSA. The JSA reaches out to the JLA for help. The JSA and JLA don't see eye to eye on some things and they do fight. However they team up to face SS as well as defeating all of the different chess players in Checkmate. Towards the end of the film some or all members of SS turn against the government/Checkmate/Luthor. Perhaps split the film with pt. 1 continuing SS' story and targeting JSA members. While also establishing the hierarchy at Checkmate. Then spend the other part of the film on establishing the characters from JSA and the conflict between SS and them. End the film with the JSA reaching out to the JLA. Have pt. 2 deal with the JLA vs. SS.