There was truly something missing in Star Wars: The Last Jedi, as the film included both Mark Hamill and Carrie Fisher, but was missing Harrison Ford. However, the movie found an interesting way to reference the fallen hero Han Solo. It seems that during the opening attack on the First Order Dreadnought, the Resistance bombers included several bombs with messages on them. These were written by Resistance fighters who wanted their bombs dropped with a little something extra, like a sarcastic greeting to the Supreme Leader, or a reference to the former pilot of the Millennium Falcon.
The image comes from the brand new book, Star Wars: The Last Jedi The Visual Dictionary, which includes an entry for the bombs that were used, as well as images of them. Some of the bombs include handwritten messages scrawled in the Star Wars language of Aurebesh including "Hi Snoke" and "Han says hi." This last one clearly was written by somebody who is a bit angry at the fact that the great hero of the Rebellion is dead.
This is a nice touch, as soldiers writing messages on bombs to the people they're about to be dropped on is actually something of a tradition in war. It's not uncommon for those in the fight to add a personal touch like this in reality, so it's not crazy to think that Resistance fighters would do the same thing.
Of course, these bombs were just a few of the total. The vast majority of them did not have snarky messages or faces painted on them. It's not even clear if these bombs shown in The Visual Dictionary are ever actually on screen. The one image that was released prior to Star Wars: The Last Jedi hitting theaters, which shows Paige Tico falling past a collection of bombs, doesn't show any messages on the bombs.
Even if we do see one in the film, it likely goes by too fast to see what it says, unless you can sight read Aurebesh, in which case...damn. We'll likely have to wait for the Blu-Ray release in order to go frame by frame in order to read any Resistance messages to the First Order.
Of course, if you want to try and locate any special bombs, it's as good a reason as any to go see Star Wars: The Last Jedi for a third time.