Don’t let your injury interfere with your race plans. In the spring your injury will not be a factor since you recovered before training began.
My injury produced doubts because it occured in the midst of a key phase of training. It prevented me from following my usual training routine.
I believe weekly/annual milage, followed by long runs and tempo runs (in that order), are the 3 primary determinants of marathon performance.
In my case I lost 7 weeks of long runs (plus a marginal amount of weekly milage), and much of the planned speed work.
This winter I expect to train normally till the race; assuming you remain injury free you will too. Under that condition we should race with confidence that training has created the fitness needed to reach out goals.