I'd LOVE it if Eggman were playable; he'd be the only additional Sonic character I'd be happy about getting. Though to be fair Tails would be more likely, and I'm pretty neutral on him.
Fun fact: the reason PSASBR couldn't get her came down to timing and timing only. Square Enix wanted the first appearance of Lara's new look to be in the Tomb Raider reboot, understandably enough. Gotta build the reboot brand and such. If PSASBR came out like, six months later, she would have been in. She was probably planned as DLC too, honestly, but due to the situation with Superbot, post-Zeus and Isaac Clarke DLC plans were basically cancelled (this is also why Dart didn't make it. They outright said he was planned as DLC).
That being said, realistic firearm reliance would keep her out of Smash anyway.