The phrase "almost certainly preferred" is correct and usable in written English.
It can be used when discussing a choice or option that is highly likely to be favored over others, though not guaranteed.
Example: "In this situation, the new policy is almost certainly preferred by the majority of employees."
Alternatives: "likely favored" or "probably preferred".
They would almost certainly prefer Sir Menzies Campbell, their distinguished foreign-affairs spokesman, as a caretaker leader until the next election.
If you're going to advertise, you'd almost certainly prefer the exposure of the Big Two — Yahoo and Google — but they're not available through Office Live.
In the end, though, Putin will almost certainly prefer to maintain the patina of democratic procedure — "I have no intention to reduce everything I've done to zero" — and preserve a strong influence over his successor.
Although it is wonderful to have this document back, nonspecialist listeners will almost certainly prefer the latest Shaw B minor, on Telarc: livelier, by current standards, and more cleanly reproduced.
Tomas Berdych vs. Daniel Brands Berdych, the No. 7 seed, would almost certainly prefer to be in the chaotic bottom half instead of the top-seeded Novak Djokovic's quarter, but he will have several more tough tests before even reaching that projected match.
A founder will almost certainly prefer to take dollars from a handful of private investors rather than submitting to the vagaries of the stock market.
They almost certainly would prefer to stay out of America's way.
The storks show uncanny ability to thrive in an unnatural environment, but almost certainly would prefer their native wetlands to a garbage dump.
But I certainly preferred books to people".
George W. Bush is president today because of Ralph Nader, the Green Party candidate, whose liberal supporters almost certainly would have preferred Mr. Gore in a two-way race.
