My thoughts on Western Europe:
Most people are saying that the Western half of Europe has been way over-used and is need of a rest, at least for one season. Although I do agree that it has been used quite extensively recently- especially the "Big 5" (Spain, France, England, Italy, Germany), I don't believe they are quite finished with the region, nor with featuring at least one of those big names. Let's look at the possibilities:
The U.K. can be ruled out because it was featured heavily last season, and though the country of Ireland wasn't used, the island was, so I'd put my money of that being skipped this year too. Possibility: Unlikely
Germany doesn't seem likely, however, WRP has really enjoyed visiting the country these recent years with 4 visits since season 14 (S14 Leg 2, S16 Leg 4, S20 Leg 5, and S22 Leg 9). This doesn't include the midleg clue in the Hamburg train station while teams were travelling from Denmark to Belgium. I would not be surprised in the slightest if this country still managed to be squeezed in there. Possibility: Unlikely
France seems unlikely since it's been featured quite a few times and has been used as recently as season 21. Possibility: Unlikely
Spain finally got featured again since season 10 and looks open to continue hosting teams, however the fact it was used in season 21 makes me unsure of it being used again already- especially since it took so long to get a revisit originally. I will tack on Portugal to the Spain talk, much like I did with Ireland in the U.K. section. I don't really see where all the Portugal hype is coming from. I think that it could host another leg, but I feel like there are several better options that WRP would look to first before attempting a return visit to the small Iberian nation. Possibility: Outside chance
Alpine Countries: Very Unlikely. Switzerland just used, and Austria has been featured a couple times within the last 10 seasons.
Benelux is another region with a shot of making a return on this season. Personally, I think the Netherlands is the least likely of the three- it looks like they're running out of ideas with using that Switchback with mediocre results. Belgium/Luxembourg are more likely, however, I don't think they're very likely for similar reasons as Spain. I think Belgium was used too recently given the number of previous visits (none), and the fact that they weren't the most successful in design or viewership. Possibility: Outside chance
Scandanvia/Far North: The only one I could maybe see from here is Iceland. I could see them doing a S6-esque opening leg there and continuing on to another European country. However, if they start by heading to Latin America, I would rule Iceland out. Possibility: Likely (Iceland), Unlikely (Scandanavia)
That leaves only one country: Italy
Italy (to me) seems to be the most likely and most obvious answer to where the race will visit this season. Though it was used as recent as S20, that was it's first and only visit since Florence in S12. Outside of Spain, it has been the most underused major country in recent seasons. It's a great country filled with it's own unique culture and several subcultures within. Possibility: Highly Likely. Possible cities/regions:
1. Rome/Vatican City- Way overdue for another visit that actually stays within the city. Hasn't been used at all since season1 and that wasn't even a full leg. The Vatican City is overdue as well, and could house a Route Info, task, or maybe even a pit stop.
2. Naples/Vesuvius/Capri- Great region, beautiful landscapes, and much different from Northern Italian big cities *cough cough* Milan/Turin *cough*
3. Venice- Would look very nice in HD, and is great jumping off point to get to Slovenia/Northern Croatia, which both seem ready for a visit.
4. Sardinia- they've been to Sicily, so why not?
5. Tuscany- with more tasks out in the vineyards or along the countryside
I could see any two of these options make it on for two legs in Italy.
Final thoughts: Look out for Italy, maybe Iceland, and maybe Belgium in Western Europe.