I believe that the next Batman solo film should be based on the "Under the Red Hood", as we all know Ben Affleck's Batman is said to be an "older more seasoned Batman" who has been operating for numerous years. Why then would the next solo Batfilm feature Dick Grayson or even Jason Todd as the Robin to Affleck's Batman. It may even be explained in this solo film that the reason Affleck's Batman is rumored to be "semi-retired" and using Batbots because of the death of Jason Todd. So The next Batman flick should begin with a Tim Drake origin story, rather than anything else, with Tim Drake becoming the first Robin in years to Affleck's Batman; within months of his becoming Robin, we then see the reemergence of Jason Todd as Red Hood, which eventually beckons Nightwing back to Gotham. By movies end we could not only have an established history for Tim Drake, but also Jason Todd, and Dick Grayson; thats three Robins in one movie! And on top of that a semi-established Joker!
Fancast Side Note... I would like people to view this part as separate from the previous idea, I want people to tell me what they think of the idea regardless of what they think of the fancast... but here it is...
Ben Affleck as Bruce Wayne aka Batman
Bryan Cranston as Jim Gordon
Age: 58
Height: 5'11"
Other Choices: Judd Law (Age: 41 , Height: 6'0")
Jeremy Irons as Alfred Pennyworth
Logan Lerman as Tim Drake aka Robin
Age:22
Height:5'9"
Steven R McQueen as Dick Grayson aka Nightwing
Age: 25
Height: 6'0"
Emma Watson as Barbara Gordon aka Batgirl
Age: 23
Height: 5'6"
Benedict Cumberatch as Joker
Age: 37
Height: 6'0"
Other Choices: Matt Smith, James Franco
And although I know many people think Jensen Ackles would be best...
He is already 36 years old...maybe in 2001 he would have been perfect but now...not so much
so my choice is
David Henrie as Jason Todd aka Red Hood
Age: 24
Height: 5'11"
Other Choices:
Alex Pettyfer - Age: 23 Height: 5'11" (Kind of Leaning Here after consideration)
Lucas Till - Age: 23 Height: 5'10"
Jean Luc Bilodeau - Age: 23 Height: 5'10"
The ages line up perfectly with each other and everything!