The following is my analysis of the likelihood that potential candidates will declare their intention to run for this seat. This is not intended to capture the likelihood that they will their party's nomination. Latest updates are italicized and in green below. Two new Republican potential candidates have been added.
Dates to watchSunday, May 25 - Independence Party candidate interviews
Monday, May 26 - Staten Island Republican Party candidate interviews
Tuesday, May 27 - Staten Island Conservative Party candidate interviews
May 26-31 - Working Families Party expected to hold candidate interviews
June 3 - Ballot petitioning starts
July 10 - Ballot petitions are due
No date set for Staten Island Democratic candidate interviews
Potential Republican Candidates
State Senator
Andrew LanzaLanza has the support of Staten Island GOP Chairman John Friscia, who might also be a candidate if Lanza declines.
He will also be meeting with Jerry Kassar, Kings County Conservative Party leader within the next few days according to the
Brooklyn Daily Eagle. For some reason though Jerry Kassar insists that Lanza is an Assembly Member.

GOP County Clerk Stephen Fiala
Fiala has support of members of the Independence Party.
He has said "I am going to seriously consider this race, I hope to come to a decision in very short order." [via
Advance]. Possibly the only advantage to a Fiala candidacy is that his seat is appointed, so if elected to Congress he would not open his seat to a special election that Democrats could pick up.
ADDED
Staten Island Republican Chairman John Friscia is quoted in the
Daily News saying "I'm not going to say I'm interested in it, I'm not going to say I'm not interested in it."

Staten Island GOP Finance Chair Dr. Jamshad Wyne
Via the Advance; "Dr. Jamshad Wyne, the borough GOP's finance chair, holding a campaign fund-raiser last night and telling the Advance that he would run if state Sen. Andrew Lanza (R-Staten Island) wasn't a candidate."Wyne was
expected to declare earlier this week.
update: downgraded to no movement
City Council Member
James Oddo will be meeting with Jerry Kassar, Kings County Conservative Party leader within the next few days according to the
Brooklyn Daily Eagle. Despite that note Oddo rarely gets any press mentions and has an
anger problem.

State Senator Marty Golden was
mentioned by Craig Eaton, below. Golden brings little to the race, risks another Republican Senate seat. He has a better chance than Eaton though as little as that is.

Brooklyn Republican Party Chair, Craig Eaton
dropped his own name as a potential candidate. He is now added to this list but with downgraded movement since no one other than he himself is dropping his name.
NOT RUNNINGDistrict Attorney Dan Donovan
Potential Democrats Candidates
Steve Harrison has already declared.
Harrison is now reported to be in
talks with the DCCC.


City Council Member Mike McMahon
Mike McMahon is rumored to have met with the Central Labor Council, an umbrella group for labor organizations in the city.McMahon has previously said he was
interested in running today. McMahon likely will not run if Cusick declares.
See:
Potential Candidates: City Council Member Mike McMahon.


Assembly Member Mike Cusick said he was
interested in running today. Cusick likely will not run if McMahon declares.
See:
Potential Candidates: Assembly Member Mike Cusick.

Assembly Member Peter Abbate previously indicated that he would respect Senator Savino's decision only running. With her being downgraded below, his chances of running now increase. This is further enhanced by Recchia's likely deciding not to run creating a vacancy among the Brooklyn delegation of electeds. Not sure if Vito Lopez would support him. The
NY Sun has an article today on Abbate and his tremendously strong connections to labor unions.
See:
Potential Candidates: Assembly member Peter Abbateupdate: downgraded to no movement
City Council Member Domenic Recchia has already indicated he is looking to drop out and unverified quotes attributed to him indicate he is talking with party officials about a decision for what is best for the party. Those are not strong indicators that he will continue running.
NOT RUNNINGState Senator Diane Savino
Labels: speculation