i90 gear and grade 5 materia

ive been told about how 2.3 will be adding i90 crafted accessories and am curious if that will mark the introduction of grade 5 materia or not. theres already grade 5 carb matter as an old quest reward (for ct i think*) but havent heard or even seen anyone ask about the materia yet. the only reason i ask is because with ct 2 coming soon and slowly getting high allagan gears my pentamelded i90s are getting replaced and didnt know if i should convert into IVs or trade for gc seals or just hold on to em for if grade Vs are getting added soon

They're not going to tell us until right before patch hits, just because it can create some market disturbances. Personally, I'd say hold onto them and wait and see. Only 2.5 weeks until patch.

the i90 gears are already an average of 1 mil a piece on my server, thats why i got my craft classes to 3star to just make my own gear for tremendously cheaper lol