(SPOILERS)
That's very possible! , or maybe he would crack for good and keep pretending with full intensity after that.. It's a heavy blow how the ambulance/police are only slightly late, when chase hears them before passing, I'm real curious about the presence that was staring at him though xx I have my doubts but they are most unlikely
I'm hoping there would be a continuation to this ending in Arches, but I highly doubt it.
wether it happens or not, I feel like we definitely need to see Leo in the next game, he is pretty much the mascot of echo ^^; would feel weird if we didn't get a glimpse or a mention at least.