Challenger is around the corner, here are the pools for the 1st tournament. Stars (from 1 to 5) are my personal ratings for the title.
Men
Pool A
Germany *****
Belgium ***
Tonga *****
Zimbabwe **
Pool B
Italy **
Chile ****
Papua New Guinea *
Hong Kong ****
Pool C
Jamaica *
South Korea **
Brazil **
Uganda ***
Women
Pool D
Colombia **
Hong Kong ***
Poland *****
Paraguay *
Pool E
Czechia **
Madagascar **
Mexico *
South Africa ***
Pool F
Papua New Guinea *
Thailand ***
Belgium ***
China ****
Of course I'm not aware of everything going on in these squads, or even all the results they may have had in the last six months or so, but I reckon these ratings might prove to be pretty accurate.
The groups don't seem really balanced in the men's competition, especially with Tonga putting things together and Belgium improving (A), and on the other hand South Korea taking once again this Series a bit off-handedly and Uruguay winning last year's edition hence the presence of a weaker South American squad, in this instance Brazil (C). In this very group Uganda is also missing its key player, Philipp Wokorach, staying in France with his 15-a-side club.
Among the 4 invitational teams in this year's World Series, HK and above all Tonga made the best impression, Uganda and Chile did not win a single match. The rest is unknown quantity but Germany has been a top seed for a couple of years now.
For the women the favorite must be Poland, but they did not take part to any tournament this year (European teams are unfairly biased by these invitational system) and are missing their captain Karolina Jaszczyszyn. China is struggling a tad since the Olympics but their showing in HK 22' was convincing. HK in their home tournament 23' were promising, so were South Africa, at home this time around. Colombia and particularly Papua New Guinea were really poor, the fact that PNG had the opportunity to play two tournaments while others could not even play one ... Thailand is my dark horse despite the absence of their speedster Jirawan Chutrakun, playing pro in the Japanese 7s championship. The two other European teams, especially Belgium, turned pro earlier this year, can do some damage too.