Not really, I mean - a wetsuit that was stored away for a long time in a dry place will get really dry and a bit stiffer because of that, but only until you take it in the water. It will also become a little bit stiffer because of the age, but since you had it in a dark place away from the sunlight I think that should also be minimal. You can soak it if you want but I don't think this is necessary. Also - I hope you used a wide hanger - otherwise there could be some hanger indentation on the wetsuits shoulders and if there are there is really not much you can do. Also, I think it's about time you use your wetsuit again :)!