It might be a bit too early for this, but designs do have to be created in advance.
2026 is the 100th anniversary of the US highway system.
For those who aren't coin collectors, here's a summary of commemorative coins: commemorative coins are not intended for circulation. With rare exceptions, there are three types: cupronickel half dollars (same material as current half dollars), silver dollars (large size), and gold $5 coins. The value listed on the coin is for decorative purposes only (and to make it a coin and not a token), but nobody would ever spend one of these.
My idea is for the obverse (heads) to have a road going off into the distance, with a 4-way junction in the background with signage (although unreadable due to distance). The reverse (tails) will be a zoomed-in version of the 4-way junction on the obverse, showing a state-named US route shield with three different designs: US 50 (CA) for the half dollar, US 1 (FL) for the dollar, and US 5 (CT) for the $5 gold coin. "Liberty" and "2026" go on the obverse, and "United States of America" and the listing of the denomination go on the reverse.
If possible, there would be mountains on US 50 (CA), generic houses on US 5 (CT), and flatness with a mix of water and land, and possibly trees, on US 1 (FL), so that the obverse would also have three different designs.