I believe they were definitely interested in getting Adrian back too, since not only would that be a return to the classic lineup, the man wrote and co-wrote some of Maiden's most well-known songs and I would imagine the Maiden camp would've been interested in tapping to that creative energy again.
Steve said he always wanted three guitarists, and this was his chance to make that happen, although I'm not so sure that was the starting position. I feel like it took a moment before they reached that point, but once they did it was obvious that's what they had to do.
What I'd like to know is Janick's position in all this. According to various sources, Steve did assure him he was keeping his spot no matter what happened and that he supported the effort to get Bruce back, but was it really that simple? Was Janick always gonna stay on? Did the Maiden camp ever consider the option of him being replaced with Adrian? It's an interesting subject to speculate upon since we'll likely never hear any official word on the behind the scenes side of things, just the PR friendly version.