I'm almost sure the communication vehicles confused themselves regarding maned wolves and scarlet ibis (for those who don't know, the brazilian names for these species are lobo-guará and guará, respectively, wich may cause confusions in some people). My bet is on the ibis because receiving 50 of them would come to meet the zoo's very spread conservation program for this species, and it's reintroduction in Guanabara Bay. Also because of previous misconceptions of mentioned communication vehicles regarding both completely different species, I tend to think that might be the case again.
About the arrival of new lions, I'm pretty sure this other male individual is going to be the actual mate of said lioness. Simba is too old, and being without any male lion is probably one of the biggest fears of the BioParque; so my bet is that "Simba" is being exhibited nowadays just so visitors won't be disappointed for going to the zoo and not seeing a lion, while the institution does not receive individuals that are more "aesthetically pleasant". I would guess they are going to house this couple of new lions in the official exhibit, as soon as they receive them, and send elderly "Simba" to the backstage, as they have done to "Gabi" and "Zé Colmeia". This way they will have a (probably) breeding pair for the public to appreciate, and won't have passed a single month since their opening without a lion for the public to view.