Oda just revealed Usopp's next power up
I think Oda is going a non-haki route of power ups for the non-monster trio Straw Hats (which I'm happy about because it gives a bit more creativity to fights). Most importantly, he gave Wranky Super Vega-Cola. And this is the most interesting to me because of the mechanics surrounding it. And this mechanic will lead to Usopp's next power up.
ODCs
in Chapter 1176, Lilith reveals these machines called Omni-Drain Convertors or ODCs.
This device is able to absorb energy. Simple. We especially saw how it was able to absorb the thermal energy of fires burning down the Owl Library, leaving behind only ice.
Now fast forward to the recent chapters, Imu has shown and his Omen flames have once again begun burning Elbaf down. And here is the most interesting part to me. In Chapter 1182, Zoro says the following :
Imu's flames turn into bullets and explosives. Now I don't know about you, but these seem like the perfect ammo for Usopp. Ammo that was even able to knock someone as strong as Zoro down temporarily. And the usage of this ammo is also very interesting.
I believe Usopp will take an ODC from Lilith or Franky and store Imu's omen flames in it. Or basically store the thermal energy in it. And he will use the ODC like he used the dials from Skypeia. I think he will finally stop shooting plants ffs.
Store the flames -> Flames turn to bullets -> Shoot
Oda gave Nami a Yonko's weapon. He's going to give Usopp a God's weapon.
Edit : It will also be funny if towards the end of Luffy and Loki vs Imu, Imu is going in for the kill on a defeated Luffy and Loki and Usopp shoots an Omen bullet at Imu hitting and/or damaging him, and Imu disappears or retreats to the Holy Land. Everyone thinks it was Usopp who defeated Imu but Imu actually went away because his time limit was over.