There’s two easy things you can do, but they both require EX unfortunately.
The safe way is to bust out with an EX roll when he jumps in. You reset the situation but it doesn’t put you at an advantage.
The other thing you can do is block the crossup and do a reversal EX Tornado Throw. This option is much riskier for obvious reasons (he can jump and get a free combo) but if it works you get a good chunk of damage on him plus a knockdown.
Also, if he doesn’t time the crossup well you can just get out with a normal roll, but it has startup so you might get counter-hit.
If he’s at the right angle you can anti-air with a standing HP like these guys said.