Most of the Marvel fanboys where looking forward for this movie after the surprising ending of the Infinity War. All were lookingbfor clues. And there are at the right spot. The movie happens before the Infinity war event and some plot theme which is likely to be linked directly to Avengers 4. But its probable and I cannot fully assure you that it may be the main plot of the Avengers 4 because they are very secrective about their story plots and twists.
Anyway coming to the movie, the movie stars the same actors form the first movie with some additions. Overall everyone where good with their performance but there is not gap to make you wow with their performance. Movie is not that good when compared to the predecessor, but it packed enough action sequence, animation, story plot to make you stick to your seats. Eventhough there are positives the movie lacks the fun and jokes that the first one provided and there are plenty of story holes which you might think It could have done in this way or that way.
The Final verdict is that if you have time and you are Marvel fanboy, this one is definite watch. But if you are the one to the remaining category you can skip this for a better movie ( only if another good movie is available) . Also the digital copy will probably releases before the fourth installment of Avengers 4, so even though if you skip it in theatres you can watch it in digital copies before Avengers 4 hits the theatres near you.