The main thing i have noticed is that in most bleach games .. they use and reuse the same shikai from the show..

my idea is to make up some of you own .. notice in the show no two releases are alike..

here i will start.. put a name .. it doesnt have to be a good name and a description

Claws- this weapon in shika form gives the user two claw looking swords . there main feat speed. these claws allow the user to move on all fours also using Shunpo from their hands making them faster than most shinigami. in there final release.. Bankai move they are still claws but they extend up each arm forming 2 small sheilds just below the shoulder. in this mode they get a bigg boost in power . the users rei is channeled throught then making them huge at will.

Sai- this weapons first release is a sai grimreaper style . it has power and range. this weapons special is a slash that has a very high critical hit % and in bankai form that attack has the potential of a 1 hit ko. or massive damage.

weapon chains- in shikai form this weapon strike like a snake. its special is to bind and squeeze the opponet.
in bankai form you go from 2 chains to 100 50 comming from each hilt. the special squeezes the oppone to death.

Boomerang - in shikai form this weapon can be thrown and returns quickly
in bankai form it can be thrown and contloled in mid air. making it a great ranged weapon. this weapons special is a close ranged attack when the user uses a combo of the boomerangs ability and shunpo to attack from nearly every direction

ax - this shikai does heavy damage. its special is breaking blocks.
in bankai form its attack cant be blocked and usr can strike the ground createing a shock wave.