1963 Fleer Baseball ... What was in series 2? Series3?

Just wondered if anyone has any info on the following series in the 63 Fleer set. Were any contracts signed with players for series 2 and beyond. Just curious if any experts out there had any knowledge to share.
Collecting 64, 66, 67, 70 & 71 Baseball. Cubs, wax, cello & rack baseball.
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Comments
I think Fleer did likely plan a second series but never put it into production due to very poor sales of the first series. In 1963 Topps had a good set, and a virtual monopoly on distributing it with gum. It appears decent cards marketed with stale tasteless cookies could not compete with a large nice looking set marketed with the bubble gum kids were used to and expected .
I also would welcome any additional information on the shortened Fleer 1963 set
Bowman Baseball -1948-1955
Fleer Baseball-1923, 1959-2007
Al