I think they have plenty of both. And overseas, it's been used to great effect, given how well the GS2's sold, worldwide.
I just feel that it's not enough. I feel that it needs even more than they've given it so far. Samsung is struggling to shake off the early bad reputation they earned themselves with poor quality and buggy devices. Their launch of the Galaxy S series, for all their efforts to promote it, was pretty underwhelming in the states, and on Verizon especially, they're playing a heavy game of catch-up:
The Epic 4G was overshadowed by the EVO.
The Captivate suffered a nasty GPS bug that drove AT&T salesmen to pretend the phone didn't exist when talking to customers.
The Galaxy S 4G on T-Mobile did alright, if you overlook how scorned Vibrant customers were for having a 4G version launch less than 3 months later.
The Fascinate suffered from so many bugs that I have yet to meet an owner who isn't upset with the phone. Worse yet, no phone has come out yet on Verizon to shake that bad stigma (outside of the Charge, which is admittedly a great phone that is often overlooked thanks to the Thunderbolt)
GS2 is changing that game up a bit, (reports of it being "the best android phone in the world" are starting to spread) but then it didn't come out on Verizon. And the Galaxy Nexus is different enough (thanks to ICS) that it can't exactly ride on the coat tails of that marketing campaign. And the Nexus NEEDS heavy marketing if it's going to be the flagship we all want it to be.
I'm sorry, I just don't see Samsung pulling it off. Not between their other endeavors, the bad rap they're still trying to shake off in America, or the price tag involved with giving the Nexus the promotion it needs.