Welborn challenges Morrison for his WBC international title on the undercard of Anthony Crolla's rematch with Jorge Linares on Saturday night.
The experienced 30 year-old, who has shared the ring with Matthew Macklin and Liam Smith, is confident he will bring Morrison's 14-fight unbeaten record to a sudden halt this weekend.
"No disrespect to Marcus, but he is somewhere I want to be," said Welborn. "He has the support of Eddie Hearn and he is getting on these big bills.
"I am here now and I am coming to win. I am coming for him and I will go for it. He will need to be switched on and I want him to come to me and give it what he has got.
"If he thinks he is the next up and coming he has got to get me out of the way and I am not going to let him.
"He is a stylish boxer but I know what I have to do to beat him and I will use my experience. In the last year I have been up and down so they probably think they have caught me at the right time but mentally everything is there now.
"I have loads left in the tank. The times when I have had my shots have been last-minute notice and it has been hard. This time I have had a good eight-week camp like I should have been doing when I have had opportunities in the past.
"I am a strong light-middleweight so when I got the call for this fight at Middleweight I knew I would be strong there too. I just wanted to get into camp, enjoy it and get stuck in again.”
Welborn's clash with Morrison is part of a huge night of action in Manchester as Linares and Crolla battle again for the WBA lightweight belt following their epic first encounter in September.
Martin J Ward defends his British super-featherweight title against Maxi Hughes in their third meeting, while Brian Rose and Jack Arnfield meet in the 'Battle of Blackpool' at middleweight.
Irish sensation Katie Taylor fights for the fourth time in the paid ranks, and Hosea Burton will be aiming to bounce back into title contention following his epic battle against Frank Buglioni.
*** Tickets are on sale priced at £40, £60, £80, £100 and £150 and available from www.manchesterarena.com or by calling 0844 847 8000. VIP tickets are exclusively available through www.matchroomboxing.com priced at £250.
