reasons why

true:

ichigo's father has the dark shiba hair like kaien shiba.

ichigo resembles kaien.

the reiatsu of the kurosaki family is incredible, to the extent of a family of the 4 major clans.

ichigos father was a captain, used mugetsu, and has even regained his power.

ichigo is way above captain level, used mugetsu, and has regained his power.

ichigo achieved bankai form in such a short time that is only comparable to one coming from a family of the 4.

other reasons i cannot think up, but you all can.

false:

i dont have any reasons as to why he CANT be a descendant of the shiba clan :P.

so, my question is only a question of your opinion. i want the opinion of all of you.