MEMBERS of Adelaide's and Port Adelaide's supporter groups will meet on Monday night to discuss the possibility of making a joint run-through banner to honour late coach Phil Walsh in Sunday's Showdown.

Crows chairman Rob Chapman said the unification of both clubs in the wake of Walsh's death might have changed the Showdown forever and would certainly give Sunday's clash a feel like none before it.

The match is due to start at 2.50pm ACST.

Walsh was senior coach of the Crows when he was killed on July 3, but spent more than a decade with the Power, helping the club to its first AFL premiership in 2004 before returning as midfield manager last year.

A private memorial will be held on Wednesday afternoon at Adelaide Oval for Walsh's family and friends, which follows an even smaller service in Adelaide last Friday.

Meanwhile, the spontaneous memorial that begun with a single bouquet of flowers placed outside Adelaide's administration building the morning of Walsh's death has been removed.

The club will photograph each individual item and create two books, one to be presented to the Walsh family and the other kept at West Lakes.

Flowers left at the memorial will be mulched and used when planting a memorial tree in the near future.