It can be hypothetically done through some Mayan cycles, but there would be no scientific evidence supporting the time math. The time of the event 65 million years is subject to a great deal of variation, but it's not really contested, coz there is no reason to do so. At least we know that we can have something under a close scrutiny and miss a basic association such as the one I described. Even the fact that
1 alautun = 20 kinchiltun = 63,081,429 tropical years
would fail to relate the KT-event catastrophe to the Yucatan peninsula and the Mayans there via the "catastrophic" year 2012.
Well, I'll agree with you on the basic idea that I don't see the connection, but the good question though would be why would anyone even consider it be connected to 2012 at all. It's not like the calendar rolls over at alautun either.
In fact, as I've mentioned before, we have the following date on a monument 13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.0.0.0.0
That's got waay more positions than even alautun. In fact, 15 positions more. So we're in no real danger of rolling into the same date as any previous catastrophe, no matter when it was.
The Mayans did occasionally use "distance dates", which consist of a date and a difference to add to it, though that happens with Calendar Round dates, not with Long Count dates. The problem being that Calendar Round dates had no explicit year and a 52 year cycle, so the only way to pin an event in a given year was with such a distance date.
At any rate, there is no known distance date from or to 2012, which makes even that kind of connection rather unsupported. If we found a date somewhere that boils down to 1 alautun before 14.0.0.0.0, we might start seriously wondering, but otherwise it seems like a bit of a tenuous connection at best.