"likely conclusion" is correct and usable in written English.
You can use it to characterise a likely outcome or result of a situation or events, for example: "The most likely conclusion from these developments is that the company will need to cut costs."
"The more likely conclusion is that users (correctly) perceive that Twitter provides little value to them".
As the game approached its final quarter hour, a goalless draw seemed only likely conclusion.
If talks do go ahead, a breakdown remains a more likely conclusion than a breakthrough.
The more likely conclusion is that the Lees choose to pay certain officials large salaries so as to ensure that such officials will acquiesce in their continued patriarchy.
If Mr. Thompson reviews RU-486, the likely conclusion will be that there is no legal basis for withdrawing the drug.
4.38pm: Henry has also furnished us with an interest analysis of the likely conclusion of tonight's count, and what it means for the province.
The likely conclusions of some think tank reports, documents show, are discussed with donors — or even potential ones — before the research is complete.
And given we live in an age of sequels and remakes, it's not surprising that 2019 is going to see a number TV/Movie franchises coming to their (likely) conclusions (Unbreakable, Star Wars, Rambo, IT, Avengers, Deadwood, Game of Thrones and Toy Story).
Please note, though, that I'm not endorsing (or condemning, for that matter) any of the following outcomes, I'm just attempting to read the political language emanating from the principal negotiators involved and draw some likely conclusions of what is likely going to be in such a deal.
Rather, it was our goal to analyze the two samples of RCT manuscripts separately, and to make likely conclusions about the parent population from each sample of manuscripts as if there was no other sample of manuscripts available for comparison.
Shrum and Matalin agree it's the definition of insanity for the president to reinsert U.S. into centuries-long religious war when likeliest conclusion a tripartitioned Iraq back to pre-1919.
