Pretty unlikely. Two years is a decent amount of time, but that seems a bit short to manage such a feat. Coby is, at least, much zaidi likely, as he had discovered an innate ability to use Haki just before the time skip and was already a captain, leaving him with three ranks to rise in order to achieve it. Helmeppo was two ranks down from that, giving him 5 to cover in order to rise to vice admiral, and we have no inkling that he can use Haki.
posted zaidi ya mwaka mmoja uliopita
Not to mention taht Coby has actually gotten a lot stronger over those two years... While there is no evidence that Helmeppo is strong enough to compete with him... XD