Launchbury shone in the reverse fixture at Adams Park in October and is all set to lead from the front at the Stade Jean Dauger in Round 5. The 22-year-old has enjoyed a stellar rise to the top of the game since his first full season in 2011/12, starring for Wasps at home and abroad and regularly impressing for England in his 14 caps to date.
"Joe is unbelievable and since I have been here he has never been anything less than good for us," said Young, who led Cardiff Blues to Amlin Challenge Cup glory in 2010.
"He is either very good or excellent and he does the bread and butter stuff as a forward really well while also possessing that bit of x-factor.
"When we have been struggling and not getting the go-forward ball, Joe has stuck his hand up and taken responsibility to make the big carries to allow others to play well.
"We keep on talking about Joe's potential but he is already there, not only as an international lock but also touching world class. He does that both in an England jersey and also a Wasps one and, rather than looking lucky to be at that level, he now looks like one of the leading lights in the England side."
Wasps currently sit at the top of Pool 4 with an unbeaten record, but Bayonne are just three points adrift and know that qualification for the quarter-finals is still in their own hands.
History is in Wasps' favour despite Bayonne's home advantage, however, with Wasps having won five and drawn one of their seven European encounters over the past five seasons. Wasps won 12-3 at Jean Dauger in 2009/10 and drew 13-13 there last season, although Bayonne's solitary success did come at this venue when they ran out 19-11 victors in the 2011/12 campaign.
Wasps have won five of their last six fixtures but Young knows that they will have to perform better than they did last time out when only a last-gasp drop goal from Andy Goode secured success at home to Exeter following a particularly poor first-half display.
"We were extremely poor in the first half. We'd had a pretty good month but I thought we let ourselves down in the first 40. Exeter played at a pace that we weren't comfortable with and it took us at least 20 minutes to get up to pace," added Young.
"We caused ourselves a lot of problems because, although we tried to play, we weren't accurate enough and never really had a foothold in Exeter's half to ask questions.
"But I thought as a team we showed a lot of character and determination to get home against a very good Exeter team. That's the first time I've beaten Exeter since I've been here so I was pretty pleased to get over the line."