The engine is basically a VW. If you had parked your car up for a year would you expect it to work (provided the batt was new)? Of course you would! There has been a lot of scare mongering lately that any aircraft that has not flown for a year is scrap. My experience is that even after 5 years there is generally very little wrong. Run it up several times, check compressions etc. If you are happy, do one circuit and check everything is still ok. If so fly around locally for an hour or so keeping a close eye on the t’s & P’s. Check it over again and consider changing oil etc.
As above you need to make sure the fuel system is OK, as this is much more likely to catch you out.
Rod1