I seriously doubt it. I can't imagine it hasn't been tried many times in their long history, whether intentionally or not, and I've never heard of it.
The phylogenetics of Pterophyllum seems to keep shifting among scientists over time and in various studies. They've been placed close to Symphysodon (discus) and Mesonauta, more recently closer to the base of the SA Heroine tree. A more recent and what I'd consider one of the best studies I've seen said their correct position "remains unclear". Where they fall seems to depend on which genes you look at, but this study put them separate but closest to a group including Hypselecara, Hoplarchus, Mesonauta, Uaru, Symphysodon, Heros-- closer to where they made sense in the first place imo, but genetics plays weird tricks sometimes.
So at one time I might have said if they'd hybridize with anything it would be discus, at another I'd have said Mesonauta-- and no one has seen either one that I've ever heard of. I've kept angels together with both, also Heros, and I've never seen even the subtlest hint of interest between them. What I have seen is fish of different genera, even different continents, hang out in odd friendships without any of the signs of courtship or spawning, like a green terror and gold severum I had once that liked to hang out together, or a friend I knew who had a frontosa hang out with I (can't remember which) SA cichlid.
Any in the group I listed above would certainly have to be more likely than Central American species that are more distantly related and on different branches of the Heroine tree.
