About 2 weeks ago there was a listing found for a new Monopoly Transformers game, and now it has been found on the US Walmart system (no price or date listed).

As noted here two weeks ago, this Monopoly game comes with a Hasbro product number, which would make it the first time Hasbro have produced a Transformers themed set themselves... as the previous sets were all licensed by non-Hasbro companies...

Product listings have been found in America from the Walmart or Target computers, of what could be another Monopoly game for Transformers... which has a current Hasbro product number, so isn't (shouldn't be) a re-release of an older version.
Actually, since it HAS a Hasbro product number, it won't be one produced by the two companies that have licenses to produce themed Monopoly games. (almost all themed Monopoly games are not produced by Hasbro... as Hasbro produces larger minimum quantities to sell around the world, while the themed sets are small runs that are too small for Hasbro to care about, to sell mostly sell in specialty stores or in a single country if it is a geographical theme)
This could either be a good quality version from Hasbro in-house with fans in mind, or a really cheap version to sell by the millions around the world.

The 2007 Transformers Monopoly set (with Dreamwave art on the box, and the board folds in half) was produced by a company called USAOpoly (looks like it could have re-released in 2013 with new box deco).
The 2015 Transformers Monopoly set (with Gen1 toy character art on the box, and the board folds into quarters) was produced by a company called Winning Moves.
The 2017 Transformers Premium/Deluxe Monopoly set (plastic sides fold open to reveal playing track, with original artwork in the middle) was also produced by Winning Moves (for about US$300-500!).
(my searches also came up with a Monopoly Junior Transformers set, but it looks like a "knock off" with bad artwork and branding on the box, with no company logos anywhere, and really bad "engrish" product description on the back)

Monopoly Transformers – Product number: F1660 – MSRP $19.99