I hate to be a doomsayer, but I think we are in deep, deep trouble.
As far as I can gather (and I've been looking into this as a Canadian retailer of Comics and Games):
Anything PRINT in NA is in for a very tough time. If I am informed correctly, the USA cannot produce print product in colour (in any real quantity) without going to Canada or China. They have facilities to print B&W paperback books, but not the kind of quality that we expect of RPGs, or even comics.
And what little they CAN print of quality full-colour books, they need access to Canadian or Mexican pulp & paper. (I've heard mixed reports from none to only one producer of paper in the continental US). No matter how true my information is, it seems clear that their ability to do so will be limited, and expensive.
In Canada, we are faced with the likelihood that we will be struck TWICE with tariffs on Game and Comic products. Possibly more times. Not just because they are often printed here, sent to the 'states, and then sent back to us, but because they are US products that are made using Canadian resources. The publishers will be charged more to manufacture them, which will result in increased MSRPs, and then we will be tariffed on them as US goods when they come into Canada. AND our economy is likely to collapse, which will kill our dollar, so the exchange will also raise prices.
We are pretty seriously in trouble.
BUT... to answer the OP's question: The MM is already in warehouses. It's "safe". You shouldn't have to worry about that book. Worry about everything that isn't actually printed yet. That stuff might never even happen.
We're in for some troubling times.