A correction and another buying opportunity would always be nice though I think it's a bit too unlikely at this stage.
100% correct, another dip would be an amazing opportunity for bitcoiners to buy before the halving because for sure after the halving there's gonna be a bullish run, one like none we've ever experienced before. Every dip is an opportunity for every bitcoiners to prepare for a bullish trend. So what could be better than a dip before the halving? 
Well, just to correct one part of this...I wouldn't expect something unlike anything we have seen before. If you look at past cycles, you will see that each time the returns are diminishing. While they are still significant, I wouldn't expect returns to be the same.
At the same time, the economic conditions are different. Institutional demand is also at another level. Average people are also taking things more seriously. These are possible reasons that it could be even more significant...though we should also realize that the market cap is much higher and therefore, these factors may just enable another successful bull cycle.
Only time will tell!