That setup is cool and I wish I'd thought of it myself, but I had a lot of trouble making it unreactable in training mode. I'll put the boring math at the end but in summary: you have to teleport fairly early to make the L bomb combo into the fake teleport bomb, but if you teleport super early, your opponent has lots of time to block same side by default then block the other way on reaction to seeing the camera move to follow Peacock's crossup teleport. If you do a late teleport, they know you can't combo from a fake teleport so they just have to listen to the voice clip to know which way to block. If you perfectly time your 50/50 teleport so L bomb will link into fake teleport bomb on the very last frame possible (which is character-specific based on how long they take to get up after sliding knockdown), they still have around 25f to react to the camera moving. I'm not saying every player will react to this, especially if they don't expect the setup in the first place, but it's still good to know.
Boring math which will inevitably be off by one frame at some point: the camera starts moving around 22f into H crossup teleport, the fake teleport bomb hits around 78f into a fake teleport, and L bomb has 32f of combined hitstop and hitstun. So the L bomb has to hit your opponent at least (78-(32-1)=)47f into the fake teleport for the hitstuns to overlap, which is 25f after the camera would have started moving if you did a non-fake teleport. If you teleport a frame or two earlier because you're worried about missing the 1 frame character-specific L bomb>teleport bomb link, that gives your opponent even longer to react.