Just so you guyz know:
Here are the three next way Carrot could be confirmed:
A - A reaction from Carrot on the victory of Luffy + a flash back of Pedro: This would confirm that Carrot is linking her future to Luffy and Pedro's words. Basically, it has to happen next chaptern after that it will be too late.
If that doesn't happen the next thing to look up for would be:
B - A couple of panel focused on Carrot doing a introspection during the Banquet or between now and the departure of the SH: Carrot was defeated and humiliated.. there is therefore high chances for her to self-reflect on her capacities. If that happens, it will also be a confirmation as Carrot would be linking her capacities toward the future and her life on the seas. This focusing can also take the form of a discussion with an ally (Wanda or Nekomamushi). In other word if there is a questionnement from Carrot's part about herself, the seas, Pedro's words or the SH, this will be the confirmation that Oda is preparing Carrot to join the crew.
If that doesn't happen the next thing to look up for would be:
C - The very end of the arc: I've talked about that
HERE. Basically the very end of the arc will be the last moment for Carrot to join by sneaking on the ship. If Carrot is seen on the ship (willingly or not), this will confirm a future recrutment. If not.. This will be the end of the theory.
Those three moments would confirm Carrot as a future crewmate. To sum up.. any couple of panel focusing mainly on Carrot would be a confirmation. For two reasons:
1. Because Oda would have no reason to do those if the story of Carrot was finished
2. Because those are potential setups for a development