Wladimir Klitschko v Tyson Fury
Could 'Dr Steelhammer' finally be ripe for the taking? A head-wisened in 27 world title fights is now carried by 39-year-old legs. While he has done a stellar job protecting his beard of late, it is unquestionably fragile.
A man of immeasurable wealth, is one eye drifting to the political situation in the Ukraine? Has Klitschko been softened by fatherhood? A fight with Fury will provide answers.
With 24 wins and half a dozen belts, the WBO mandatory challenger Tyson Fury is haemorrhaging confidence. Uncle Peter has provided stability and discipline since assuming coaching duties.
In addition to entering with significant sways in height and reach, Fury is younger, fresher, quicker and more fluid. He is also highly skilled and an effortless switch-hitter.
Presently deemed a 7-2 underdog, expect those odds to dip if Frank Warren can deliver home court for the summer showdown.
Sergey Kovalev v Adonis Stevenson
The two best fighters in the 175lb class also happen to be the division's two most explosive punchers??? and two of the most destructive men in all of boxing.
And with all four major sanctioning belts up for grabs, this east meets west collision would be one of the most poignant in the sport.
'Krusher' Kovalev, unbeaten in 28 (one draw), boasts 24 stoppages and the unwanted tag that his concrete fists once took a man's life inside the ring. 'Superman' Stevenson, born in Haiti, based in Quebec, has conceded just once - later avenged - in 27, wiping out 21 early.
Nevertheless, both are also regarded as technicians.
The Russian showed nous to supplement his brawn when outpointing Bernard Hopkins while Stevenson is a sharp, skilful southpaw with a freakish 77in reach. Expect plenty of quality to embellish the inevitable dramatics.
Billy Joe Saunders v Chris Eubank Jr
After their initial 'edge of the seat' epic in November, formal declaration of a replay between these gladiators who seriously despise each other can't come quickly enough.
Ex-Olympian Saunders provides the pedigree. The 25-year-old Romany from Hatfield has sublime southpaw skills and, last time, skated the first six rounds to secure a lead that proved unassailable. And the European champion promises to establish his supremacy even more emphatically if they re-convene.
But Eubank Jr will have profited massively from negotiating the full championship trip and he further advanced with a thrilling last round stoppage of Russia's Dmitry Chudinov to snare the WBA 'interim' belt in February.
He looks to possess heavier hands, greater brawn and is blessed with more instinctive talent than his father. The Brighton man will probably enter a marginal favourite for a rematch that might even surpass the original.
Saul Alvarez v Miguel Cotto
When it comes to boxing rivalries, Mexico versus Puerto Rico is like England against Scotland in soccer to the power ten!
Presently, Alvarez and Cotto are the respective darlings of these fanatical fighting nations and their styles would gel to serve up a fistic fiesta.
The bull-strong, flame-haired Mexican is younger, fresher and appears sturdier. Cotto, despite three fewer fights, is a four-weight world champion with a vast edge in experience. Both have skill and variety to burn, both can bang from either barrel.
'Canelo' is formerly a WBC and WBA Light-Middle king but presently without a belt, while Cotto, just 5ft 7in tall, is an undersized WBC Middleweight champion. Don't discount a catch-weight match-up at around 156lbs. Regardless, national bragging rights would supersede any title at stake.
Terence Crawford v Lucas Matthyss
Possibly the most appetising boxer-banger match-up in any weight division.
Crawford, from the boxing desert of Omaha, survived a bullet wound to the skull to seize the WBO Lightweight strap from Ricky Burns in Glasgow 14 months back.
Masterful defences over Yuriorkis Gamboa (TKO 9) and Ray Beltran
(PTS 12) earned 'Bud' the 2014 Fighter of the Year gong and
stylistic comparisons to Tommy Hearns. Unbeaten in 26, with 18
quickies, the 27-year-old further enhanced his stock by capturing a
second WBO title, up at light-welter, earlier this month.
In a career spanning 11 years, Argentine bomber Matthysse is yet to land a bonafide world title, despite culling 34 of his 37 victims ahead of schedule. Disturbingly strong and combustible, 'The Machine' will force Crawford to answer fresh questions regarding his whiskers and ticker.