By looking at the current Form of the others two striker (Robbin & Adebayor), I believe Eduardo will still need sometime to get his first team appearance in Arsenal.
I would have suggest to Eduardo to working harder in Training ground in order to get the confident of Wenger.. But right now after 5 round of EPL, I believe Wenger will still park him under substitude list simply because Robbin and Adebayor have both performed very well for the last few matches.
As a Arsenal Fans, i do not hope that Eduardo could earn his appearance when the above two are injured.
Therefore, Keep-it-up and we will Support you Eduardo........