"But I'm hopeful I'll sign in the next few days. Arsenal are a step higher (than Werder). I think I'll play for the reserves at the start to recover my sensations, as I've not been playing for a long time.
"And then it's up to me to earn my place. The asset is that there's a lot of games in England."
Bischoff has spent three seasons in Germany but a number of injuries have prevented him from showing his best form.
"I'd have played much more without my thigh injury, because the technical staff trusted me," he added. "But I at least took part in 10 or 15 Bundesliga games from the bench and did train with great players such as Diego, [Johann] Micoud, [Torsten] Frings or [Ivan] Klasnic.
"It made me improve a lot. For the moment, my career is abroad."