If we're talking about the version who had just beaten Tsyzu at 140lbs then I think Hatton would be too big, too strong and just too physical for Lomachenko to overcome.
Hatton is a terrible style match up for Lomachenko (and I’m factoring in the size, of course) - feels weird to say that because Loma is a far more talented fighter all around…
At 140 Hatton is too big and too strong he would do a Salido on Lomachenko without needing the low blows to help him though.
Hatton too big and horrible style match up for Loma. Loma's style is to use his combination of fast feet and short reach to get inside and fighting Hatton inside is a recipe for getting mauled. Hatton stops Loma.