I believe I've kracked the code.
Here's what I believe is a very good encapsulation of what the next game's roster is going to look like according to the thread's general consensus.
45 veterans, 13 newcomers, a bunch of echoes and the Mii Fighters.
I tried to keep as many as possible of the most commonly considered safe veterans inside the most commonly deemed likely number of veterans (40 something), and I added the newcomers that are usually seen as particularly likely.
My question is... Would you find something like this actually exciting?
To be perfectly honest, I'm pretty sure I'd kinda hate this.