Jurgen Klopp may have turned a few heads with some impressive signings during this summer transfer window, but he'll undoubtedly be turning to his favoured forward to guide their club to another Bundesliga title.
Bayern Munich may once again be favourites for the league, especially after acquiring Robert Lewandowski, but Dortmund certainly have enough about them to put up a stern challenge to any Bavarian dominance.
For they have a certain 25-year-old who looks set for another fantastic year of success.
If we take a look at the graph below, which displays the league goals of Dortmund's top four goalscorers last season, via WhoScored.com, we can see just how much the club relied upon Reus to score, after Lewandowski.
Despite playing on the left-hand side of attack for the majority of the season, the German international was able to outscore striker Pierre-Emerick Aubameyang and Henrikh Mkhitaryan, an attacking midfielder who often played off the front man himself.
Reus also scores when it matters the most. Despite an impressive tally in the league overall, four of those goals came in eight matches against the Bundesliga's top five sides last season, according to Transfermarkt.co.uk. Add to that another three assists in those games and you have one of the best big-game players in the league today.
Klopp will, of course, not be as concerned about this as he may have been at certain points last season, with the arrival of Adrian Ramos and Ciro Immobile this summer. Both strikers have phenomenal scoring records for their previous clubs and should do more than enough to pitch in for the absence of a certain Polish striker.
Yet if there's a chance that both new forwards could struggle in their preliminary season at Dortmund, the coach and fans alike will undoubtedly turn to their favoured son to find a solution to such a problem.
This is because what we now see of Dortmund is a team that is essentially built around one man—Reus—from every aspect of the pitch. And it's only going to get less and less subtle now that Lewandowski has left the club.
It comes as no surprise that Klopp theoretically now has three players who can play on the right wing and even more who can play up front, yet he only has one man in mind when he comes to the left of his attack.
If we take a look at the Squawka graphic above, which displays Reus' passing in a recent Bundesliga game against Stuttgart, we can see just how integral he is to the entire side. Despite playing on the left, he is seen here moving across the centre of the pitch and often swapping wings for brief moments in the game.
Like a playmaker, he makes the passes and keeps possession ticking along yet he can also find himself in a perfect position in the final third and turn that chance into a goal. He is an absolutely vital cog in the Dortmund machine and one who is only going to become more prevalent this season.
One final, minor point to add is that Reus missed the World Cup. This may not seem like something that would be too relevant to his form for Dortmund, but what we have to consider is that he will undoubtedly feel as though he missed out.
The generation of players that he grew up with throughout the numerous youth sides across the country—Mario Goetze, Manuel Neuer, Andre Schurrle, etc.—have finally come of age and collected the biggest victory of their careers. He missed that and will undoubtedly be more determined than ever to make up for it.
What we now have in Reus is a player who looks at the top of his game at a club that has built its team around him, who will be more determined now than ever to prove that he's one of the best players not only in the Bundesliga but across Europe, too.
This is the Dortmund star's season and he looks more than set for a huge year.